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2.6.1 CHECK-IN – CHECK-IN – CHECK-OUT PRINCIPLE (TRIPLE-C)

In order not to leave play situations involving the ball uncovered at any time and also not to have
two referees unnecessarily covering the same on-ball play situation there is a basic procedure to
be followed. To make the on-ball coverage switch as smooth and efficient as possible between two
referees (Trail-Centre or Trail-Lead), a Check-in – Check-in – Check-out principle is used (also referred
as triple-C).

Diagram 13: Diagram 14:
In this example, the on-ball play situation is on C side When ball crosses over from C to T side, the C shall
and, C is covering the play. follow the play situation until T has started (checked-
in) to cover the situation. C then turns the attention to
off-ball play in their primary area.

Diagram 15:
After T has started to cover (checked-in) the situation
the C checks-out of the situation and turns the
attention to off-ball play in their primary area.

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